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Fix bug#7672 Unknown column error in order clause

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When fixing Item_func_plus in ORDER BY clause field c is searched in all
opened tables, but because c is an alias it wasn't found there.

This patch adds a flag to select_lex which allows Item_field::fix_fields() 
to look up in select's item_list to find aliased fields.


sql/item.cc:
  Fix bug#7672 Unknown column error in order clause
  When fixing fields in ORDER BY clause allow Item_field::fix_fields() to look up items in select's item list to find aliased fields.
sql/sql_lex.cc:
   Fix bug#7672 Unknown column error in order clause
sql/sql_lex.h:
  Fix bug#7672 Unknown column error in order clause
  Added flag to select_lex allowing Item_field::fix_fields to look up items in select's item list.
sql/sql_select.cc:
  Fix bug#7672 Unknown column error in order clause
mysql-test/t/select.test:
  Test case for bug#7672 Unknown column error in order clause
mysql-test/r/select.result:
  Test case for bug#7672 Unknown column error in order clause
This commit is contained in:
unknown
2005-10-09 23:05:44 +04:00
parent a89807336f
commit f3f84ed8a0
6 changed files with 38 additions and 1 deletions
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6
sql/sql_select.cc
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@@ -6845,8 +6845,14 @@ find_order_in_list(THD *thd,TABLE_LIST *tables,ORDER *order,List<Item> &fields,
return 0;
}
order->in_field_list=0;
/* Allow lookup in select's item_list to find aliased fields */
thd->lex.select_lex.is_item_list_lookup= 1;
if ((*order->item)->fix_fields(thd,tables) || thd->fatal_error)
{
thd->lex.select_lex.is_item_list_lookup= 0;
return 1; // Wrong field
}
thd->lex.select_lex.is_item_list_lookup= 0;
all_fields.push_front(*order->item); // Add new field to field list
order->item=(Item**) all_fields.head_ref();
return 0;